- engorge (itself) on someone or something
- engorge (itself) on someone or something & engorge (itself) with something[for an animal] to drink its fill of blood. •
The vampire bat engorged itself on a number of creatures last night.
•Mosquitoes engorge on human victims.
•The mosquitoes engorged themselves with my blood all night long.
Dictionary of American idioms. 2013.